Radiology Skeletal System 9f8cfad5 Cleavage plane sign is seen in? A Parosteal osteosarcoma B Ewing's sarcoma C Chondrosarcoma D Metastasis High-Yield Explanation Ans AParaosteal sarcoma arises exophytically from long bones and thus there is a small plane of cleavage between it and the main shaft of bone - the Cleavage plane sign.